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["Alexander Eulitz \[Eugen\]" <question237753@xxxxxxxxxxxxxxxxxxxxx>]

Question #237753 on Yade changed:
https://answers.launchpad.net/yade/+question/237753

Alexander Eulitz [Eugen] proposed the following answer:
Hi Lida,

I agree with jduriez, you should have a closer look at the manual.
But nevertheless here are some hints:
first of all your line "spheres.toSimulation()" is not necessary because "O.bodies.append(spheres)" is already adding your spheres to simulation.

Furthermore it is not necessary to add a PyRunner Engine for your purpose of calculating a velocity.
Just remove the Pyrunner and add this after you determined the timestep:

#...
velocity=0.0001 #it's a decimal point not a comma

timeNeed=0.006/velocity

iterNeed=timeNeed/O.dt

O.run()
#...

Have fun,
Alex

-----Ursprüngliche Nachricht-----
Von: bounces@xxxxxxxxxxxxx [mailto:bounces@xxxxxxxxxxxxx] Im Auftrag von jduriez
Gesendet: Mittwoch, 23. Oktober 2013 17:12
An: Eulitz, Alexander
Betreff: Re: [Question #237753]: Particle compaction in a cylinder wall

Question #237753 on Yade changed:
https://answers.launchpad.net/yade/+question/237753

    Status: Open => Answered

jduriez proposed the following answer:
Hello Lida,

Alexander meant in his comment about O.dt "in seconds per iteratiON".
What is this variable is briefly described here https://www.yade- dem.org/doc/yade.wrapper.html#yade.wrapper.Omega.dt.

Unfortunately, if this does not help you so much (as it is normal for
yade/DEM beginners), I'm afraid you will mandatorily have to give a
serious attention to Yade manual (mainly User's Manual and DEM
Background), to finish your computations.

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